BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

Song Sparrow Population Trend in Wyoming

All statesForest birds

Song Sparrow in Wyoming has surged: up 173% on the route-weighted index since 1970.

+173%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
106Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Song Sparrow Trends in WyomingNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Song Sparrow has surged in Wyoming: up 172% on the route-weighted index since 1970.

Song Sparrow Population Forecast in Wyoming

If the recent trend holds, Song Sparrow in Wyoming is projected to rise about 11% by 2030 — from 3.1 in 2025 to a central estimate of 3.5 (95% range 2.2–4.7). A 5-year backtest shows a typical error of ±26.3%, with 100% of held-out values landing inside the 95% band.

+11%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
3.5Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
2.2–4.795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±26.3%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Song Sparrow in Wyoming is projected to rise about 11% by 2030 — from 3.1 in 2025 to a central estimate of 3.5 (95% range 2.2–4.7). A 5-year backtest shows a typical error of ±26.3%, with 100% of held-out values landing inside the 95% band.19682030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20263.32.14.6
20273.42.14.6
20283.42.24.6
20293.42.24.7
20303.52.24.7

Song Sparrow Survey Routes in Wyoming

Routes recording Song Sparrow in Wyoming.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Wilson2920251979
Buckskin Mtn2520251980
Soda Lake2120251981
Fontenelle1820251982
Pathfinder1820181983
Seedskadee 21820242024
Pine Tree1419951993
Big Sandy1420251987
Alpine1220251979
Mtn View1120241980
Green River1119821977
Boulder1020251983
Warbonnet1020251990
Dubois920251968
Riverside920251968
Mammoth820251983
Seedskadee820231986
Cody720251983
Basin720251971
Dayton720251980
Horse Creek720251982
Lysite720241998
Midvale620252017
Moose620251976
Otto520251970

Song Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.